#define _CRT_SECURE_NO_WARNINGS 1
#include <ctype.h>
#include <stdio.h>

int main()
{
	char arr[] = "I Am a Student";
	//            I Am a Student\0
	//            0123 
	int i = 0;
	while (arr[i] != '\0')
	{
		//if (arr[i] >= 'a' && arr[i] <= 'z')
		if(islower(arr[i]))
		{
			arr[i] = toupper(arr[i]);
		}
		i++;
	}
	printf("%s\n", arr);

	return 0;
}
